Keep in mind that I am NOT using the original wiring block that plugs all wires in together in one block. That block was missing when I got the tractor. The switch I got from NAPA I am sure is an INDAK switch as my old keys would work in it as well as the new switch key would turn the old switch.
Most of the pre-70's tractors were screw terminal switches. Less as we entered into the 1970's. The 1053, made only one year - 1970, used the same switch as the 850 and 1050. It had screw terminals, not a wiring block to plug on the switch. Just an FYI.